Home / 378,397,776.64-522,090,110.08-221,680,637.16

Finding the Fourth Proportional to 378,397,776.64, 522,090,110.08 and 221,680,637.16

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Solution

The fourth proportional to 378,397,776.64, 522,090,110.08 and 221,680,637.16 is: 305,861,385.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,397,776.64 : 522,090,110.08 = 221,680,637.16 : x
  2. Step 2: Convert to fraction form
    378,397,776.64/522,090,110.08 = 221,680,637.16/x
  3. Step 3: Cross multiply
    378,397,776.64x = 522,090,110.08 × 221,680,637.16
  4. Step 4: Simplify right side
    378,397,776.64x = 115,737,268,257,468,928
  5. Step 5: Solve for x
    x = 115,737,268,257,468,928/378,397,776.64
  6. Step 6: Final answer
    x = 305,861,385.56

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.